<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>initialize2DArray</title>
</head>

<body>
    <div>打开浏览器控制台查看结果</div>
    <script>
        const initialize2DArray = (w, h, val = null) =>
            Array.from({ length: h }).map(() => Array.from({ length: w }).fill(val));
        console.log(initialize2DArray(2, 2, 0));
    </script>
</body>

</html>